[Fixed] Windows Update Error Code 0x800b0109

Reasons for Error Code 0x800B0109

• Communication failure with Microsoft update servers
• Proxy Internet connection interfering with updates
• Antivirus or security software blocking updates
• Broken or incomplete Windows Update system
• Network-related issues

Disable Proxy Internet Connection

1. Open Internet Explorer and click on Tools > Internet Options.
2. Navigate to the Connections tab and click on LAN Settings.
3. Ensure the proxy server option is unchecked.

Note: If your antivirus software has proxy settings enabled, disable them as well.

Repair Windows Update Services

Follow these steps to reset Windows Update services using command lines:

1. Open the Command Prompt as an administrator.
2. Run the command: net stop wuauserv to stop the Windows Update service.
3. Navigate to C:\Windows\ and rename the SoftwareDistribution folder to SoftwareDistribution.old.
4. Restart the Windows Update service using: net start wuauserv.
5. Check for updates again to confirm the issue is resolved.

Note: These steps will not affect your personal data or programs.

SFC Scan to Fix Error Code 0x800B0109

The SFC (System File Checker) scan helps detect and repair corrupted system files:

1. 1. Open Command Prompt as an administrator.
   2. Type SFC /SCANNOW and press Enter.

1. Wait for the scan to complete and follow any on-screen instructions.

Note: A positive result means the issues are resolved, while a negative result indicates further corruption requiring additional repairs.

Final Solution: Reinstall Windows Operating System

If all else fails, reinstalling Windows may be necessary:

1. Back up all personal data to avoid data loss.
2. Follow the official Microsoft guide to reinstall your version of Windows.

Important: Verify hardware compatibility with your Windows version before proceeding.